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Question
A monkey climbs 30 feets at the beginning of each hour and rests for while when he slips back 20 feet before he again starts climbing in the beginning of the next hour. If he begins his ascent at 8:00 a.m., at what time will he first touch a flag at 120 feet from the ground?
A monkey climbs 30 feets at the beginning of each hour and rests for while when he slips back 20 feet before he again starts climbing in the beginning of the next hour. If he begins his ascent at 8:00 a.m., at what time will he first touch a flag at 120 feet from the ground?
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Solution
The correct option is C 6 P.M..
Effectively, he climbs 10 feet in each hour.In order to climb 90 feets, he'll take 9 hours. But at the start of 10th, he will climb 30 feet more to reach 120 feet. Hence, total time=10 hours.
Effectively, he climbs 10 feet in each hour.In order to climb 90 feets, he'll take 9 hours. But at the start of 10th, he will climb 30 feet more to reach 120 feet. Hence, total time=10 hours.
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